Amyrmex golbachi is a rare Neotropical species of ant and the only known species in the genus Amyrmex. It is currently only known from males from the Amazon basin of Brazil and from northern Argentina.
Nothomyrmecia, also known as the dinosaur ant or dawn ant, is an extremely rare genus of ants consisting of a single species, Nothomyrmecia macrops. These ants live in South Australia, nesting in old-growth mallee woodland and Eucalyptus woodland. The full distribution of Nothomyrmecia has never been assessed, and it is unknown how widespread the species truly is; its potential range may be wider if it does favour old-growth mallee woodland. Possible threats to its survival include habitat destruction and climate change. Nothomyrmecia is most active when it is cold because workers encounter fewer competitors and predators such as Camponotus and Iridomyrmex, and it also increases hunting success. Thus, the increase of temperature may prevent them from foraging and very few areas would be suitable for the ant to live in. As a result, the IUCN lists the ant as Critically Endangered.
A gamergate is a mated worker ant that can reproduce sexually, i.e., lay fertilized eggs that will develop as females. In the vast majority of ant species, workers are sterile and gamergates are restricted to taxa where the workers have a functional sperm reservoir ('spermatheca'). In some species, gamergates reproduce in addition to winged queens, while in other species the queen caste has been completely replaced by gamergates. In gamergate species, all workers in a colony have similar reproductive potentials, but as a result of physical interactions, a dominance hierarchy is formed and only one or a few top-ranking workers can mate and produce eggs. Subsequently however, aggression is no longer needed as gamergates secrete chemical signals that inform the other workers of their reproductive status in the colony.
Stigmatomma is a genus of ants in the subfamily Amblyoponinae. The genus has a worldwide distribution, and like most other amblyoponines, Stigmatomma species are specialized predators. First described by Roger (1859), it was for a long time considered to be a synonym of Amblyopone until it was revived as an independent genus by Yoshimura & Fisher (2012) based on worker mandible morphology.
Mystrium is a rare genus of ants in the subfamily Amblyoponinae. First described by Roger (1862) with the description of the queen of M. mysticum, the genus contains 14 species, all of which occur in the rainforests of the Old World with over half of the species endemic to the Malagasy region.
Xymmer is a genus of ant in the subfamily Amblyoponinae containing the single species Xymmer muticus.
Brownimecia is an extinct genus of ants, the only genus in the tribe Brownimeciini and subfamily Brownimeciinae of the Formicidae. Fossils of the single identified species, Brownimecia clavata, are known from the Middle Cretaceous of North America. The genus is one of several ants described from Middle Cretaceous ambers of New Jersey. Brownimecia was initially placed in the subfamily Ponerinae, until it was transferred to its own subfamily in 2003; it can be distinguished from other ants due to its unusual sickle-like mandibles and other morphological features that makes this ant unique among the Formicidae. The ant is also small, measuring 3.43 millimetres (0.135 in), and a stinger is present in almost all of the specimens collected. The morphology of the mandibles suggest a high level of feeding specialization.
Stigmatomma mulanae is a species of ant of the genus Stigmatomma. Described by Xu in 2000 from a single dealate queen found in 1998 in the Xishuangbanna Nature Reserve in Yunnan Province, it was placed as the type species of Bannapone, under the name Bannapone mulanae. It was moved to Stigmatomma by Ward & Fisher (2016).
Asphinctopone is a small genus of rarely encountered Afrotropical ants in the subfamily Ponerinae.
Boloponera is a genus of small ants in the subfamily Ponerinae. The genus contains the single species Boloponera vicans, known from a single worker specimen collected in leaf litter in the Central African Republic. It is sometimes referred to as Bry's ant after its discoverer, Brian Fisher.
Stigmatomma pluto is a species of ant in the subfamily Amblyoponinae. The species was first described as Amblyopone pluto by Gotwald and Levieux in 1972 and moved to the genus Stigmatomma in 2012.
Armaniidae was a name formerly given to a group of extinct ant-like hymenopterans known from a series of Cretaceous fossils found in Asia and Africa. Armaniidae has been suggested by several authors to belong to the family Formicidae as one of the stem-group subfamilies, Armaniinae; however, this position has not been taken up by myrmecologists. The family contained seven described genera and thirteen described species. An analysis of fossil ants based on antenna structure in 2017 resulted in three of the family being broken up with some genera being moved to Sphecomyrminae and other genera being relegated to incertae sedis in Formicidae or Aculeata.
Stigmatomma scrobiceps is a species of ant in the genus Stigmatomma. It was described as Bannapone scrobiceps by Guénard et al. in 2013, based on two specimens collected in Yunnan Province, China, and placed as the second species in Bannapone. It was moved to Stigmatomma by Ward & Fisher (2016).
Pachycondyla eocenica is an extinct species of ant in the formicid subfamily Ponerinae described from fossils found in Europe. P. eocenica is one of six Lutetian Pachycondyla species.
Pachycondyla lutzi is an extinct species of ant in the formicid subfamily Ponerinae described by from fossils found in Europe. P. lutzi is one of six Lutetian Pachycondyla species.
Pachycondyla parvula is an extinct species of ant in the formicid subfamily Ponerinae described by from a fossil found in Europe. P. parvula is one of six Lutetian Pachycondyla species.
Pachycondyla petiolosa is an extinct species of ant in the formicid subfamily Ponerinae described by from a fossil found in Europe. P. parvula is one of six Lutetian Pachycondyla species.
Myanmyrma is an extinct genus of ants not placed into any Formicidae subfamily. Fossils of the single known species, Myanmyrma gracilis, are known from the Middle Cretaceous of Asia. The genus is one of several ants described from Middle Cretaceous ambers of Myanmar.
Pachycondyla petrosa is an extinct species of ant in the formicid subfamily Ponerinae described from a fossil found in Europe. P. petrosa is one of six Lutetian Pachycondyla species.
